…in the theme of ideas:
Has anyone considered the viability of this?
Do away with ‘Mustafar’ (bear with me)…but keep the slaughter sequence?
Repurpose it.
Start the movie with Kylo dropping out of HS . Landing on EXAGOL!..
There’s your establishing sequence! Then repurpose the slaughter on Mustafar (via colour correction) to have Kylo killing the cultists in order to get to/into Palpatine’s lair? (Instead of it being to find the way finder)
Keep it all, but make two sequences across two planets, just one???
Brilliant idea! Some extreme color correction though.
EDIT: Gave it the old college try but too many things going against it pieced together this way… Ren is now very dirty when piloting the ship to Exegol for no apparent reason. Only his TIE flies to Exegol but there are stormtroopers suddenly with him fighting the cultists. The sun is out when fighting in the forest. Suddenly the forest is gone with no sun and he’s at Palpatine’s lair. Nothing matches up well.
The Kylo Ren fan film has some great establishing shot footage of Kylo landing on star-killer base (similar colour scheme to Exogol) along with Stormtroopers.